The first affordable oil free D-Icers. The new oil free motors are more energy efficient. They save money when used for Aeration or Deicing. Why Choose Our Oil-Free D-Icer? The innovative motor design, high-efficiency, and extra features leave the competition behind. A superior product that costs no more than the competition. It is a powerful submersible motor-driven water circulation unit that prevents ice formation during winter months by continuously propelling warmer subsurface water up to the surface. The D-Icer keeps the area ice-free. It's ideal for use around a boat or dock. The unique one-piece design of the shroud prevents large debris from being sucked through and damaging the propeller, a major cause of failure in other ice prevention devices. Optional thermostat control is available, as well as an optional flotation collar to hold the D-Icer near the surface for aerating. Oil-Free design is more energy efficient than the typical Oil-Filled units! Molded glass filled nylon shroud guides water flow and blocks debris. Continuous duty 120v or 230v single phase motors can run non-stop for years without maintenance. Designed for harsh saltwater environment with renewable zinc anode for corrosion protection. Easy to install by one person - fast setup allows use as a portable unit. 2 year warranty.